public void PUT_RemoveContract([PexAssumeUnderTest] HashSet.HashSet <int> hs, int x)
{
AssumePrecondition.IsTrue(true);
int Old_hsCount = hs.Count;
int Old_x = x;
bool Old_hsContainsX = hs.Contains(x);
bool New_Ret = hs.Remove(x);
int New_hsCount = hs.Count;
int New_x = x;
bool New_hsContainsX = hs.Contains(x);
PexObserve.ValueForViewing("$old_hs_Count", Old_hsCount);
PexObserve.ValueForViewing("$new_hs_Count", New_hsCount);
PexObserve.ValueForViewing("$old_hs_x", Old_x);
PexObserve.ValueForViewing("$new_hs_x", New_x);
PexObserve.ValueForViewing("$New_ret", New_Ret);
PexObserve.ValueForViewing("$old_hs_contains_x", Old_hsContainsX);
PexObserve.ValueForViewing("$new_hs_contains_x", New_hsContainsX);
Assert.True(((New_x == Old_x && (!(New_hsContainsX))) && ((((New_Ret && New_hsCount == Old_hsCount - 1 && New_hsCount != Old_hsCount) && (((New_hsCount == Old_x && Old_x != Old_hsCount && New_x != Old_hsCount && Old_x == New_hsCount) && New_x == New_hsCount) || ((Old_x != New_hsCount && New_x != New_hsCount) && (!(New_x == New_hsCount))))) && Old_hsContainsX) || (((New_hsCount == Old_hsCount && (!(New_Ret))) && (((New_x == Old_hsCount && Old_x == Old_hsCount && Old_x == New_hsCount) && New_x == New_hsCount) || ((Old_x != Old_hsCount && New_x != Old_hsCount && Old_x != New_hsCount && New_x != New_hsCount) && (!(New_x == New_hsCount))))) && (!(Old_hsContainsX))))));
}
public void PUT_AddContract([PexAssumeUnderTest] HashSet.HashSet <int> hs, int x)
{
AssumePrecondition.IsTrue(true);
int Old_hsCount = hs.Count;
int Old_x = x;
bool Old_hsContainsX = hs.Contains(x);
//code
bool New_Ret = hs.Add(x);
int New_hsCount = hs.Count;
bool New_hsContainsX = hs.Contains(x);
PexObserve.ValueForViewing("$old_hs_Count", Old_hsCount);
PexObserve.ValueForViewing("$new_hs_Count", New_hsCount);
PexObserve.ValueForViewing("$old_hs_x", Old_x);
PexObserve.ValueForViewing("$New_ret", New_Ret);
PexObserve.ValueForViewing("$old_hs_contains_x", Old_hsContainsX);
PexObserve.ValueForViewing("$new_hs_contains_x", New_hsContainsX);
Assert.True(((New_hsContainsX && (!(New_Ret)) && Old_hsContainsX && New_hsCount == Old_hsCount && Old_hsCount >= 1) || (New_hsContainsX && (!(Old_hsContainsX)) && New_Ret && New_hsCount == 1 + Old_hsCount && New_hsCount >= 1)));
}